you guys act like NiGHTS dimension is the only wave here with that said the NiGHTS dimension is also just one of the dreams residing in the plane of dreams of the collective unconscious and has a quatero spiral disc shaped universall structure, along with the realm of being which would quite quickly equal 2-B. dreams are indicated to be worlds while NiGHTS has made doors and used his unique abilities to access them, the games infer they run parallel, all the while we forget the realm of being and the plane of dreams which is much larger and contains all sorts of Dreams/Worlds including NiGHTS.
https://ia800302.us.archive.org/Boo...e_007_-_may_1996_UK_0030.jp2&scale=1&rotate=0
"If any game can repeat Sonic's track record, this must be it - Team Sonic's quest to re-create the feeling of flight experienced in dreams and in space. - Nights as set in the world of dreams. Not dreams themselves, or the all the levels would keep changing location all the time and you'd never be able to tell what's going on. And just as you were about to complete it you'd wake. Nights is set in the actual plane of dreams, called the NiGHTS dimension."
NiGHTS dimension is a Dream A part of an entire wave of dreams, so you see NiGHTS dimension having the assets of a Universe and A World Right? each dream create dimensions just like it in the plane of dreams and NiGHTS isn't the only one.
and a funny light joke I should add, Yuji Naka said NiGHTS and the worlds come from us, What if we decided to dream a 2-B Sized Universe Or Multiverse hmmm? even if you dreamed otherwise you'd just be adding to the collection as in Journey Of Dreams it's said all dreams support world's like NiGHTS Dimension (this is a joke)
—What were some of the challenges of creating this "dream world" ?
Naka: Well, the very first designs that Oshima drew were very different from where we ended up. He interpreted the theme in a more fantastic way, a fantasy world of dreams. When I saw that, I told him that no one really has dreams like that. Dreams are usually closer to reality, and bear more of a resemblance to one's inner psyche and subconscious. Everyone dreams, so I said let's try and create a more natural image, something closer to the dreams we all have. The world of NiGHTS (in this game at least) derives from that way of thinking.
Iizuka: Since this was a world of "dreams" we were depicting—the mysterious world of the unconscious—we had to understand the whole thing before we could begin creating it. Take an island. If it's a real island, it's easy enough to create. Once we settled on the "dream" concept, though, it meant we had to design and create every detail of that island ex nihilo.
Nidcom: NiGHTS is considered to be one the most magical, inspiring and mischievous characters Sonic Team ever created, continuing on through dreams long after the game has been won. Has NiGHTS ever appeared in your own dreams?
Yuji Naka: Of course. NiGHTS came from your dreams too. Being so, NiGHTS will keep living for a long time.
this also means those dreams are universes as well.
with all the nitpicking aside it's clear the verse is at least 2-B, clear as day.